Inventor · disambiguated record
Charles T. Fromknecht
Also filed as: FROMKNECHT CHARLES T
4 granted patents·108 citations·filing 1975–1980
79Inventor score
Technology areasA47L
Files withSINGER CO4
Top patents by PatentIndex Score
4 records- 0179US4124916AVacuum cleaner condition indicator and safety deviceSINGER CO·Filed 1977·Granted Nov 14, 1978·47 cites·6 claims
- 0272US4020525AVacuum cleaner filter bag condition indicatorSINGER CO·Filed 1975·Granted May 3, 1977·37 cites·7 claims
- 0344US4342132ACarpet pile sensor and indicator for carpet cleanerSINGER CO·Filed 1980·Granted Aug 3, 1982·14 cites·12 claims
- 0439US4063326AVacuum cleaner suction controlSINGER CO·Filed 1976·Granted Dec 20, 1977·10 cites·2 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →